ln` Delta` ABC cosA=`-(2)/(3)` the equation with roots sin A ,tan A is
1) `6x^(2)+sqrt(5)x-5=0` 2) `6x^(2)-sqrt(5)x+5=0` 3) `6x^(2)-sqrt(5)x-5=0` 4) `6x^(2)+sqrt(5)x+5=0`

(6) sqrt(5)x^(2)-2sqrt(2)x-2sqrt(5)=0

x^(2)+(3-sqrt(5))x-3sqrt(5)=0

2sqrt(3)x^(2)+x-5sqrt(3)=0

Solve: sqrt(5)x^(2) + x + sqrt(5) = 0

Solution of 3x^2-2sqrt5x-5=0

the equation whose roots are multiplied by -3 of those of 9x^(2)-6x^(2)+5x-4=0 is

6sqrt(3)x^(2)-47x+5sqrt(3)

The equation whose roots are exceed by 1 then those of x^(3)5x^(2)+6x-3=0 is

Solve sqrt(5x^(2)-6x+8)-sqrt(5x^(2)-6x-7)=1

If A,B,C are the angles of a given triangle ABC . If cosA.cosB.cosC= (sqrt3-1)/8 and sinA.sinB.sinC= (3+sqrt3)/8 The cubic equation whose roots are tanA, tanB, tanC is (A) x^3-(3+2sqrt(3))x^2+(5+4sqrt(3))x-(3+2sqrt(3))=0 (B) x^3-(3+-2sqrt(3))x^2+(5+4sqrt(3))x+(3+2sqrt(3))=0 (C) x^3+(3+2sqrt(3))x^2+(5+4sqrt(3))x+(3+2sqrt(3))=0 (D) x^3-(3+2sqrt(3))x^2+(5+4sqrt(3))x+(3+2sqrt(3))=0